NHTSA ID Number: 10181222
Manufacturer Communication Number: B340420
TSB/Document Date: 2020-10-19
Summary
PROCUT BRAKE LATHE UPGRADE: On certain newer BMW
vehicles (e.g., G12 M760i, G14, G15), the technician cannot perform brake rotor resurfacing using the ProCut PFM9.2 or X9 brake lathe. The lathe gearbox housing contacts the largediameter rotor (aka brake disc), preventing proper setup. New models introduced with brake rotors larger than 374 mm (approx. 14.75") require new equipment for service.
10/5/2020
34 04 20_PROCUT BRAKE LATHE UPGRADE
SIB 34 04 20
PROCUT BRAKE LATHE UPGRADE
2020-09-24
This Service Information Bulletin (Revision 1) replaces SI B34 04 20 dated May 2020.
What’s New (Specific text highlighted):
Correction
MODEL
All
SITUATION
On certain newer BMW vehicles (e.g., G12 M760i, G14, G15), the technician cannot perform brake rotor
resurfacing using the ProCut PFM9.2 or X9 brake lathe. The lathe gearbox housing contacts the largediameter rotor (aka brake disc), preventing proper setup.
CAUSE
New models introduced with brake rotors larger than 374 mm (approx. 14.75”) require new equipment for
service.
CORRECTION
Upgraded gearbox kit installed by ProCut.
The gearbox upgrade kit is required to be installed and available for use in your workshop by January 1,
2021
On and after January 1, 2021, all BMW centers are required to follow all corresponding service information
bulletins that relate to this topic.
Any rotor replacements submitted for reimbursement through a claim submission to BMW will be
requested to be returned for review by the Warranty Parts Return Center (WPRC) and subject to
debit if they are found to be suitable for machining.
PROCEDURE
Contact your local ProCut representative, requesting they perform Tech Bulletin TB3, BMW Large rotor
upgrade package. Refer to the attached ProCut Tech Bulletin TB3.
PARTS INFORMATION
For efficient and quality rotor resurfacing, additional lathe hardware upgrades are recommended, as per
attached ProCut Tech Bulletin TB3.
WARRANTY INFORMATION
ProCut Brake Lathe Equipment upgrades, and maintenance are not covered under Warranty.
The price list for various levels of upgrade can be found in the attached “BMW package - Order Form”.
It is highly recommended and advised that BMW centers will take advantage of this introductory upgrade
offer, to keep the already purchased equipment up to date and relevant for new BMW products. Also, the
gearbox update will be necessary for soon-to-be released resurfacing procedure for cross-drilled rotors on
M-Sport vehicles.
QUESTIONS REGARDING THIS BULLETIN
Technical inquiries
Submit feedback at the top of this bulletin
Copyright ©2020 BMW of North America, Inc.
1/2
10/5/2020
Warranty inquiries
Parts inquiries
34 04 20_PROCUT BRAKE LATHE UPGRADE
Submit an IDS ticket to the Warranty Department or use
the chat available in the Warranty Documentation Portal
Submit an IDS ticket to the Parts Department
Supporting Materials
picture_as_pdf B34 04 20 ProCut Tech Bulletin TB3.pdf
picture_as_pdf B34 04 20 BMW package order form.pdf
Copyright ©2020 BMW of North America, Inc.
2/2
Attachment 1 to SI B34 04 20
May, 2020
PROCUT BRAKE LATHE UPGRADE
PROCEDURE
1
Attachment 2 to SI B34 04 20
May, 2020
PROCUT BRAKE LATHE UPGRADE
PARTS INFORMATION
1
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
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TSB/Document ID: B340420
Replacement Service Bulletin Number:
MFR Communication Date: 2020-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
MFR Component Subsystem:
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